Category: It’s Technical

One of our devout readers suggested we toss together some posts about cooling tower basics, maintenance, and troubleshooting. My first thought was- Good idea! My second thought was, why didn’t I think of that? Cooling towers are like air handlers…

From time to time someone asks about thermistor sensor averaging. Typical questions are: Why do I have to use four? Why do they have to be connected in series-parallel? What the heck is series parallel? Have you ever seen a…

Electronics work just like you do; they determine what’s happening by looking at inputs like temperature and pressure, and decide what to do based on what they “see”. The only difference between your brain and electronics is you use your…

Control Boards rarely fail, they’re usually misdiagnosed or murdered. When control boards do fail it’s normally an output contact failure caused by age or an electrical surge like lightning or a technician shuffling across carpet before touching it. It’s a…

A Control board looks at inputs and generates outputs based on the inputs it sees. That’s it. Let’s put this in perspective- Input= you hit your thumb with a hammer. Output= you swear. If the input doesn’t happen (hammer hitting…

If you don’t know how to troubleshoot electronics you’re job is in jeopardy. Heating and cooling equipment with integrated electronics is here to stay; it wasn’t a fad, it’s not limited to “high-end” equipment, and it’s not going…

Questions: You have a two stage coil; what coil section is first stage? What coil section is second stage? Does it even matter? Answers: It depends. It depends. Most of the time. Face-split, row-split or tube-split; they need to…